'\" te
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.TH SCSI_FIND_SENSE_DESCR 9F "Jun 30, 2006"
.SH NAME
scsi_find_sense_descr \- find descriptor in SCSI sense data
.SH SYNOPSIS
.nf
#include <sys/scsi/scsi.h>



\fBuint8_t *\fR\fBscsi_find_sense_descr\fR(\fBuint8_t *\fR\fIsense_buffer\fR, \fBint\fR \fIsense_buf_len\fR,
     \fBint\fR \fIreq_descr_type\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIsense_buffer\fR\fR
.ad
.RS 18n
Pointer to a buffer containing \fBSCSI\fR descriptor sense data. The data is
expected in wire format starting at the response code.
.RE

.sp
.ne 2
.na
\fB\fIsense_buf_len\fR\fR
.ad
.RS 18n
Integer that contains the length of sense buffer in bytes.
.RE

.sp
.ne 2
.na
\fB\fIreq_descr_type\fR\fR
.ad
.RS 18n
Integer that contains the descriptor type value for the desired sense
descriptor.
.RE

.SH DESCRIPTION
The \fBscsi_find_sense_descr()\fR function is used to obtain a pointer to a
specific descriptor type, specified by \fIreq_descr_type\fR, within a
descriptor sense buffer. Before returning the pointer,
\fBscsi_find_sense_descr()\fR verifies that the entire descriptor is present
based on the length provided in \fIsense_buf_len\fR.
.sp
.LP
Any value for \fIreq_descr_type\fR can be requested. The following descriptor
types are already defined:
.sp
.in +2
.nf
#define DESCR_INFORMATION         0x00
#define DESCR_COMMAND_SPECIFIC    0x01
#define DESCR_SENSE_KEY_SPECIFIC  0x02
#define DESCR_FRU                 0x03
#define DESCR_STREAM_COMMANDS     0x04
#define DESCR_BLOCK_COMMANDS      0x05
#define DESCR_OSD_OID             0x06
#define DESCR_OSD_RESP_INTEGRITY  0x07
#define DESCR_OSD_ATTR_ID         0x08
.fi
.in -2

.sp
.LP
Drivers should use \fBscsi_validate_sense\fR(9F) to ensure that the sense
buffer contains valid descriptor sense data.
.SH RETURN VALUES
The \fBscsi_find_sense_descr()\fR function returns a pointer to a sense
descriptor of the requested type if a descriptor of that type exists. If no
such descriptor exists, \fBscsi_find_sense_descr()\fR returns \fINULL\fR.
.SH CONTEXT
The \fBscsi_find_sense_descr()\fR function can be called from user or interrupt
context.
.SH SEE ALSO
.BR scsi_ext_sense_fields (9F),
.BR scsi_sense_asc (9F),
.BR scsi_sense_ascq (9F),
.BR scsi_sense_cmdspecific_uint64 (9F),
.BR scsi_sense_info_uint64 (9F),
.BR scsi_sense_key (9F),
.BR scsi_validate_sense (9F)
